| 28.18 | | Artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide |
| 2818.10 | | Artificial corundum, whether or not chemically defined |
| 2818.10 | 010 | - Sized grains |
| 2818.10 | 090 | - Other |
| 2818.20 | 000 | Aluminium oxide, other than artificial corundum |
| 2818.30 | 000 | Aluminium hydroxide |
| 28.19 | | Chromium oxides and hydroxides |
| 2819.10 | 000 | Chromium trioxide |
| 2819.90 | 000 | Other |
| 28.20 | | Manganese oxides |
| 2820.10 | 000 | Manganese dioxide |
| 2820.90 | 000 | Other |
| 28.21 | | Iron oxides and hydroxides; earth colours containing 70 % or more by weight of combined iron evaluated as Fe2O3 |
| 2821.10 | | Iron oxides and hydroxides |
| 2821.10 | 010 | - Iron oxides |
| 2821.10 | 090 | - Iron hydroxides |
| 2821.20 | 000 | Earth colours |
| 28.22 | | |
| 2822.00 | | Cobalt oxides and hydroxides; commercial cobalt oxides |
| 2822.00 | 010 | - Cobalt oxides and commercial cobalt oxides |
| 2822.00 | 090 | - Cobalt hydroxides |
| 28.23 | | |
| 2823.00 | 000 | Titanium oxides |
Harmonized Tariff Schedule of Japans inquiry: 51412019l307764784
